PL RS P5L39_40 Review 3 WS

Primary 5

Rocket Science

Name __________________________________________________
Tutor
Topic REVIEW 3 (LESSON 39-40)

__________________________________________________

REVIEW 3 (LESSON 39-40)

Primary 5: Rocket Science

Lesson Outline
• Section A: Multiple Choice Questions (56 marks)
• Section B: Open-ended Questions (44 marks)

2

Primary 5: Rocket Science

For each question from 1 to 28, four options are given. One of them is the correct answer.

1. What is generally common among insects and birds? (56 marks)

(1) They have a pair of legs. ()
(2) Their young look like the adults
(3) They reproduce by laying eggs.
(4) They have the same type of body covering.

2. Study the diagram below.

Life cycle of animals

3 stages 4 stages

Young lives in Young lives on Young lives in
water land water

L M N

L M N
(1) Grasshopper Mosquito Frog
(2) Frog Grasshopper Mosquito
(3) Mosquito Grasshopper
(4) Frog Frog Grasshopper
Mosquito

( )

3

Primary 5: Rocket Science

3. Brenda conducted an experiment to find out how the amount of roots would affect the
amount of water taken in by the plants. She used the set-ups shown below.

oil
roots

Her teacher told her that she would need a control set-up to confirm that
it was the roots that took in the water.
Which one of the following should Brenda use as a control for her experiment
(1) (2)

(3) (4)

roots
wrapped
in plastic
bag

()

4

Primary 5: Rocket Science

4. The diagram below shows the human digestive system.

A

B
C

Which of the following graphs correctly shows the amount of undigested food
at A, B and C?

(1) (2)

Amount of Amount of
undigested undigested

food food

(3) A B C (4) ABC

Amount of Amount of
undigested undigested

food food

ABC ABC

()

5

Primary 5: Rocket Science

5. The diagram below shows the respiratory system of a man. He breathes in air through his
nose at A and breathes out air through his mouth at B.
A

B

Which one of the following statements about the air that enters the respiratory system
at A and the air that leaves at B is correct?

(1) The air at A is warmer than the air at B. ()
(2) The air at A has more dust than the air at B.
(3) The air at A has more water vapour than the air at B.
(4) The air at A has more carbon dioxide than the air at B.

6

Primary 5: Rocket Science

6.

X
Y

Z

A Part X allows air to enter and leave the body.
B Part Y allows the exchange of gases to take place.
C Part Z is a tube that connects the mouth to the stomach

()

7

Primary 5: Rocket Science

7. Study the diagram below. All parts of the body
Respiratory System
System C
A Muscular system
System C Circulatory system
Muscular system
B Circulatory system

Digestive System (

What could A, B and System C be?

A B
(1) Oxygen Food
(2) Food Oxygen
(3) Food Oxygen
(4) Oxygen Food

)

8

Primary 5: Rocket Science

8. The table below shows the heart rate of two persons and the rate of blood flow through
their blood vessels.

Heart rate (beats/min) Person A Person B
55 66
Rate of blood flow in the blood 70 85
vessels (ml/min)

Based on the above information, which one of the following is correct?

(1) The heart rate does not affect the rate of blood flow.
(2) When the heart rate increases, the rate of blood flow decreases.
(3) When the heart rate increases, the rate of blood flow increases.
(4) When the heart rate increases, the rate of blood flow remains the same.

()

9

Primary 5: Rocket Science

9. In an experiment, Maia put a plant with two white flowers, X and Y, in a beaker of red-
coloured water. She made two cuts, P and Q, at the stem of the plant as shown below.
After a few hours, flower Y turned red but flower X remained white.

flower Y flower X
cut P cut Q

Red-coloured
water

Which of the following shows the cut-sections of the water-carrying tubes Maia would
observe at P and Q?

(1)

part coloured red
(2)

(3)

(4)

()

10

Primary 5: Rocket Science

10. Alex removed some tubes from the stems of the plant shown below. He placed the plant
in a beaker of red-coloured water near a window.

White flower M White flower N

Part P Part Q
Food-carrying tubes Food-carrying tubes
removed and water-carrying
tubes removed
Red-coloured water

Which of the following observations would Alex make after some time?

A Part P swelled.
B Part Q swelled.
C White flower M turned red.
D White flower N turned red.

(1) A and C only
(2) B and C only
(3) B and D only
(4) A, C and D only

( )

11

Primary 5: Rocket Science

11. A scientist observed that organism A can glow in the dark. He wanted to create a flower
that also glows in the dark. He learnt that the ability to glow in the dark is an inheritable
trait, so he obtained a cell part of organism A and injected it into one cell part of the flower.

cell membrane X
cytoplasm Y
nucleus
Z

cell of organism A flower cell

Which cell parts of organism A and the flower are involved in the above experiment?

Cell part removed from Replaced with Part ______ of the
organism A flower cell

(1) Nucleus X

(2) Cytoplasm Y

(3) Cytoplasm Z

(4) Cell membrane Y

()

12

Primary 5: Rocket Science

12. Study the cell below carefully. cell wall
nucleus chloroplast

cell membrane

Where can you find this cell in the parts of the organisms below?
A B CD

mmoossssggrroowwininggoonnlologg gignignegrer ccacatcutsus oorrcchhididflfolowweer r

(1) C only
(2) A and C only
(3) A, B and D only
(4) A, B, C and D

( )

13

Primary 5: Rocket Science

13. The diagram below shows the fertilisation process of fish X.
Male fish waits to spread
sperm over the eggs
Female fish lays
eggs in the water

In what way (s) is/are the process similar to that of a human?

A Many sperms can fertilise one egg.
B Only the female parent is needed for fertilisation to occur.
C Fertilisation happens outside the body for both fish X and humans.
D The sperm cell must fuse with the egg cell for fertilisation to take place..

(1) C only
(2) D only
(3) A and C only
(4) B and D only

()

14

Primary 5: Rocket Science

14. In a Science quiz on human reproduction, Alif had to answer some True/False questions
by writing ‘T’ for ‘True’ and ‘F’ for ‘False’. His answers are shown below.

A. Many sperms can fertilise an egg. T
F
B. The fertilised egg develops in the womb. T

C. The penis produces the sperms until it is ready to be deposited F
into the vagina.

D. Fertilisation happens in the ovary.

Which of the following statements is correct based on Alif’s answers?

(1) Alif has two answers wrong.
(2) Alif has four answers wrong.
(3) Alif has three answers correct.
(4) Alif has only one answer correct.

( )

15

Primary 5: Rocket Science

15. Jedd conducted an experiment to find out the ability of an object to float or sink in salt water
and tap water. He placed four objects, A, B, C and D, into each tank of water as shown
below.

AA BB CC DD AA CC DD
BB

Tank with tap water Tank with salt water

A scuba diver diving in the sea has to wear a belt of weights around his waist to ensure
his body stays underwater.

weights

Based on Jedd’s experimental results, which object is the most suitable to act as the
weights for the scuba diver?

(1) A
(2) B
(3) C
(4) D

()

16

Primary 5: Rocket Science

16. Look at the diagram below carefully

rerteotrotrsttsantadnd

sstrtirningg

MMaaggnneet tXX rreeppeel l MaMgangenteYt Y MMagangent eZt Z

N

ccoommppaassss

Magnet X is freely hanging from a retort stand and allowed to rest.

When the three magnets are placed near one another, Magnets Y and Z attract each
other but Magnets X and Y repel each other.

Which one of the diagrams shows the correct poles for Magnets Y and Z?

(1) N S SN
MMaaggnneteZt Z
MMaaggnneett YY
NS
(2) N S MMaaggnneteZt Z

MMaaggnneett YY NS
MMaaggnneteZt Z
(3) S N
SN
MMaaggnneett YY Maaggnneet tZZ

(4) SS N

MMagangenet tYY ()

17

Primary 5: Rocket Science

17. Mei Ling conducted an experiment with the set-up below. There was a drop of ink in the
centre of the tube. She poured some water into the flask through the funnel

drop of ink

short glass long glass tube
tube
water
funnel

flask

bottle

In which direction did the drop of ink move and what was the reason for the movement?

Direction Reason
(1) Air entered the bottle.
(2) The ink occupied the space in the long glass tube.
(3) Water occupied the space in the flask.
(4) Air in the bottle contracted.

()

18

Primary 5: Rocket Science

18. A few pieces of ice cubes were heated for ten minutes. A graph showing the change in
temperature was plotted as shown below.

Temperature (oC)

100 C
B
Time (min)
A
0 (

Which parts A, B, or C show that heat was gained?

(1) B only
(2) A and C only
(3) B and C only
(4) A, B and C

)

19

Primary 5: Rocket Science

19. John was walking along the pavement when he observed narrow gaps between the pieces
of concrete on the pavement.

Top view of pavement

concrete concrete

Width X
He plotted two graphs (A and B) on two different days to show the changes in width X as
the temperature changes.

Width X (mm)

A

B
0

Temperature (oC)
Which of the following shows the correct graph and explanation on the changes in width
X as the day becomes hotter?

Graph Explanation
(1) A The concrete pieces lost heat and contracted.
(2) B The concrete pieces lost heat and contracted.
(3) A The concrete pieces gained heat and expanded.
(4) B The concrete pieces gained heat and expanded.

()

20

Primary 5: Rocket Science

20. Maria set up an experiment as shown below. She placed four different rods, S, T, U and
V, which were of the same length in a container. A thumbtack was stuck at the end of
each rod using an equal amount of wax. She then poured hot water into the container.

container of S
hot water
T
U
wax V
thumbtack

Maria then recorded the time taken for the thumbtacks to drop from each rod in the table
below.

Rod Time taken for thumbtack to drop (s)
S 10
T 17
U 26
V 24

Which of the following shows the correct order of the conductivity of heat of Rods S, T, U
and V?

Poorest conductor of heat Best conductor of heat
VU
(1) S T TS
TS
(2) V U ST

(3) U V

(4) U V

()

21

Primary 5: Rocket Science

21. Joseph conducted an experiment with two metal cylinders containing hot water and

drew a graph to represent the rate of cooling of the water.
Temperature of water (oC)

B Time (min)
A

Which of the following pair of cylinders of water shows the ones Joseph used at the
start of the experiment?

(1) (2)

50oC 50oC 50oC 80oC
A B A B

(3) (4)

50oC 80oC 50oC 50oC
A B A
B
)
(

22

Primary 5: Rocket Science

22. The graph below shows the amount of light reflected by four materials, A, B, C and D

Amount of light detected (lux)
(lux)

A
B

C
D

0 Distance (m)
(lux)

The picture below shows a traffic cone with a reflector strip on it. This reflector strip
reflects light when light from vehicles shine on it. This allows road users to see the traffic
cone from a distance easily.

reflector strip

traffic cone

(1) A
(2) B
(3) C
(4) D

()

23

Primary 5: Rocket Science

23. Emily wanted to find out if the position of a torch and an object would affect the shadow of
the object formed on the screen.
She placed a torch at position P and an object at position R as shown below. The height
of the shadow cast on the screen by the object was 10 cm.

torch object 10 cm
screen
P 5 cm Q 5 cm R 5 cm S

Emily then placed the torch and the object at different positions, P, Q, R and S. She
measured the height of each shadow.

Which one of the following sets of measurement of shadow is correct based on the
position of the torch and the object?

Position of torch Position of object Height of shadow
(1) P S More than 10 cm

(2) P Q More than 10 cm

(3) Q R Less than 10 cm
(4) R S Less than 10 cm

()

24

Primary 5: Rocket Science

24. Ben has a cup with a base that is curved upwards as shown in the diagram below
base curved up

He poured 250 ml of cold water into the cup and left it on the table at a room temperature
of 28 oC as shown below.

water at 4 oC
table top
After a few minutes, Ben observed that water droplets were formed.
Which of the following correctly shows what Ben would observe?

()

25

Primary 5: Rocket Science

25. Study the two diagrams below.

cloud sky mist

land kettle

How are the clouds in the sky similar to the mist formed around the spout of a kettle of
boiling water?

A Both are made up of water vapour.
B Both are made up of water droplets.
C Both are formed by evaporation of water only.
D Both are formed by losing heat to the surroundings.

(1) A and C only
(2) A and D only
(3) B and D only
(4) B, C and D only

( )

26

Primary 5: Rocket Science

26. Kimberly made an incomplete circuit set-up as shown below. The three-way switch

was made using four pins and a metal strip. .

JJ Key:
KK - pin
L - bulb
- battery
L - wire
- metal strip

She had to add four wires to the circuit so that when the metal strip is moved to touch
the pins (J, K and L), only one bulb will light up at a time. Which diagram correctly
shows how Kimberly should connect the four wires?

(1) (2)

(3) (4)

()

27

Primary 5: Rocket Science

27. A circuit was made using a battery and four light bulb holders G, H, J and K. The wires

were hidden behind a card such that only the bulb holders can be seen.
battery bulb holder

card

Lucas tried to find out how G, H, J and K were connected using two identical light
bulbs. Her findings are shown below.

No bulbs at Observations
H and J
H and G Bulbs at holder G and K lit up
G and K
Bulbs at holder J and K lit up

Bulbs at holder H and J did not
light up

Which one of the following shows the circuit behind the circuit card?

(1) (2)

(3) (4)

()

28

Primary 5: Rocket Science

28. The diagram below shows a hair dryer with two switches, A and B.

Switch A activates the motor of the fan for the hair dryer to give out cool air.
Switch B activates the heater to give out hot air.

SSwwitictchhAA
SwSiwtcihtcBh B
To use the hair dryer, the motor must be activated to give out moving air. The heater
is then activated if hot air is needed.
Which of the following circuits below shows the circuit of the hair dryer above?
(1) (2)

(3) (4)

()

29

Primary 5: Rocket Science

SECTION B: (44 marks)
1. Melvin observed two animals, X and Y, as shown below.

Animal X Animal Y

(a) Based on the diagrams only, which group of animals do X and Y belong to? Give a

reason for your answer. [1]

Melvin then drew a flowchart to classify the above animals X and Y and an additional
animal Z.

Animals

Question No
Q Animals X and Y
Yes

Animal Z

(b) What could question Q be? [1]

30

Primary 5: Rocket Science

2. The graph below shows the mass of the mosquito during the four stages, A, B, C
and D, of its life cycle.
D is the adult stage.

mass of the mosquito

CD

B
A

time

(a) Name stage C in the life cycle of the mosquito. [1]

Johnny found a container of water with mosquitoes at stage B.

His mother told him to spray a layer of oil onto the surface of the water to kill the
mosquito.

layer of oil

stage B of the
mosquitoes

water

(b) Give a reason why the layer of oil would kill the mosquitoes. [1]

31

Primary 5: Rocket Science

3. Patricia wanted to observe some seeds grow into seedlings. She set up two dishes each
with three similar seeds under different conditions as shown in the diagrams below.

seeds seeds

dish A wet cotton dish B wet cotton
(beside an open window) wool (in a dark cupboard) wool

She placed dish A beside an open window while dish B was placed in a dark
cupboard.

(a) What was Patricia trying to find out? [1]

(b) Other than water, state two other conditions for germination to take place. [1]

After a few days, some seeds germinated. The mass of part K of the seedling
was measured over nine days and recorded in the table below.

Day 1 Day 3 Day 5 Day 7 Day 9

Mass 1 0.8 0.6 0.4 0.2
(g) [1]

part K

(c) Did the mass of the part K increase or decrease? Explain your answer

32

Primary 5: Rocket Science

4. The diagram below shows the human digestive system.
E

GF

(a) Name the parts of the digestive system represented by E and F. [1]
E: ___________________________ [1]
F: ___________________________

(b) What is the function of part G of the digestive system?

(c) The graph below shows the volume of blood supplied per minute to the legs during
resting and running.

Volume of blood Activities
supplied per resting
minute (cm3)

running

Legs

Based on the graph above, explain how running affects the volume of blood

supplied to the legs [2]

33

Primary 5: Rocket Science

5. Amelia carried out 3 activities A, B and C. After each activity, she immediately breathed
out some gas through a straw into a glass tube containing limewater as shown below. .
Blow air

Straw

Limewater

The limewater turns chalky in the presence of carbon dioxide. She recorded the time
taken for the limewater to turn chalky as shown in Table 1 below. She rested for 30
minutes before carrying out the next activity.

Table 1

Activity Time taken for limewater to turn chalky (Seconds)
A 26
B 80
C 46

(a) Based on the information above, fill in activities B and C in the table below. [1]

Action Activity
Sitting A
Slow walking
Running

(b) Name the human system that allows Amelia to breathe out the gas. [1]

(c) Based on Table 1, how can we conclude that activity A is running? [2]

34

Primary 5: Rocket Science

6. Ali collected some cells from a leaf and a flower of the plant below and observed them
under a microscope.
flower

leaf

The two cells below were observed.
part A

Cell X Cell Y

(a) Which cells, X and Y, come from the leaf and the flower cell?
Leaf: Cell ___________________________

Flower: Cell _________________________

Explain your answer. [2]

(b) What is the function of part A of cell X? [1]

35

Primary 5: Rocket Science
7. The diagram below shows a flower that is pollinated by insects.

(a) State two characteristics of flowers that help them to attract insects. [1]

The diagram below shows how a fruit is formed from flower G. The fruit has been cut

open.
seeds

Process X Process Y

Flower G Fruit
(b) Describe process X. [1]

(c) State one characteristic that the fruit has in order for the seeds to be dispersed by

animals. . [1]

36

Primary 5: Rocket Science

8. Wei Xiong wanted to find out which materials, A, B and C, could absorb the most
amount of water.

He placed material A, B and C in the funnel one at a time and poured some water
into the funnel.

water poured in
material

funnel

measuring cylinder

water collected

(a) In order for his test to be fair, which of the following variables should he keep the
same or change?

Put a tick () in the correct box. [1]

Variables Keep the same Change
(i) Thickness of material
(ii) Amount of water poured in

(b) The results of his experiment were shown in a table below.

Material Volume of water collected (ml)
A 89
B 45
C 32

Based on the results obtained, which material is most suitable to clean up a spill on

the floor? Explain your answer. [2]

37

Primary 5: Rocket Science

9. Jane set up the following circuit as shown below.
steel nail

switch [1]
(a) What would happen to the steel nail when Jane closed the switch?

38

Primary 5: Rocket Science

Jane realised that some doors in schools are fitted with a magnetic plate and a circuit in
a circuit holder as shown in the diagram below to ensure that the doors remain closed..

magnetic plate circuit holder
door

The diagram below shows the circuit in the circuit holder

steel rod

magnetic plate

circuit holder

door

switch A [2]
(b) Explain why the door remains closed when switch A is closed.

(c) When the steel rod is replaced with rod X, the door could not be kept closed.

State a possible property of Rod X. [1]

39

Primary 5: Rocket Science

10. Jan heated a beaker of ice cubes using an electric heater. She started her experiment
at 9.00 a.m. and recorded the temperature at 5 minute intervals in the table below..

Time Temperature of water (oC) State of water
9.00 AM 0 Solid
9.05 AM 0
9.10 AM 35 Solid and liquid
9.15 AM 70 Liquid
Liquid

(a) Based on the table above, state and describe the process taking place from [2]
9.00 AM to 9.05 AM

(b) Jan said that the water was boiling at 9.15 AM. From the table, explain whether her

statement was true. [1]

40

Primary 5: Rocket Science

11. Mei Mei carries out an experiment to find out the amount of light reflected by three different
materials, A, B and C, of similar thickness and size as shown below.

torch

clear glass
container

light sensor material

Her results are recorded below. Amount of light detected (Units)
300
Materials 26
A 450
B
C

(a) Her friend advises her to conduct the experiment in a black box instead of a clear
glass container in order to get more accurate results.

Explain why this is so. [1]

(b) Based on the results, state a difference between materials A and B. [1]

41

Primary 5: Rocket Science

(c) The traffic cone below is used along the roads to direct drivers away from
dangerous areas and is especially useful at night when there is less light on the
roads.

Part X
Part Y

Which material, A, B or C, is most suitable to make parts X and Y of the cone?

Explain your choice. [2]

42

Primary 5: Rocket Science

12. Hui En bought a water bottle from the store. The salesman told her that the water
bottle could keep her drinks cold. The diagram of the bottle is shown below.

lid

inner tube
(attached to lid)

In order to use the bottle to keep her drinks cold, she needs to remove the inner tube and
leave it in the freezer until it is completely frozen. After it is frozen, she can pour her drink
into the bottle and put the frozen inner tube back into the bottle. .

(a) Explain how the inner tube keeps her drink cold [1]

(b) Hui En’s mother suggested that she could use the inner tube to keep her drink
warm as well. What can Hui En do to the inner tube to keep her drink warm? [1]

43

Primary 5: Rocket Science

13. Karen set up two water cycle models, Set-up A and Set-up B, as shown in the diagram
below. Both set-ups were placed in an air-conditioned room.

Hot water was poured into both containers and an empty cup was placed in the middle
of each container. Glass dishes were used to cover both set-ups. For Set-up B, ice
cubes were placed on the glass dish.

After 10 minutes, water was observed to be dripping from the bottom of the glass dishes
into both cups as shown in the diagram below.

ice cubes

glass dish

water container water
cup

hot water

Set-up A Set-up B

(a) Explain how water was collected in the cup in both Set-ups A and B [2]

(b) In which set-up, A or B, was more water collected in the cup? Explain your answer.
a [2]

(c) Karen wanted to speed up the process in which water was collected in the cup for

Set-up B. Suggest a change she could make to Set-up B so that she could collect

more water in a shorter time. A [1]

44

Primary 5: Rocket Science

14. The diagram below shows the electrical circuit of the light bulbs in Tom’s house.

Living Kitchen Bedroom Bedroom
room 1 2
Power
supply

wall

(a) State one advantage of the electrical circuit arrangement shown above. [1]

(b) Tom wanted to install a ceiling fan in his living room. An incomplete circuit diagram
is shown below consisting of a piece of wire, a dual switch, a light bulb, a ceiling fan
and a power supply.

Complete the circuit diagram below so that only the light bulb or the ceiling fan

could be switched on at any one time. [2]

Power
supply

ceiling fan

A
wire

B
dual switch

45